HUYEN, Tran; 						TU, Le Cao.
 Some problem on the shadow of segments infinite boolean rings.
<strong>VNU Journal of Science: Mathematics - Physics</strong>, [S.l.], v. 23, n. 4, dec. 2007.
ISSN 2588-1124.
Available at: &lt;<a href="https://js.vnu.edu.vn/MaP/article/view/2090" target="_new">https://js.vnu.edu.vn/MaP/article/view/2090</a>&gt;. Date accessed: 24 nov. 2024.